Bar spacer for concrete construction



0m. -14, 1924; y Y 1513 334 J. F. HAVEMEYER BAR SPACER FOR CONCRETECONSTRUCTION Filed" Feb. 249 1922 Patented Get. 14, 1924.

UNITED STATES PATENT OFFICE.

JOHN F. HAVEMEYER, OF ARDSLEY-ON-HUDSON, NEW YORK.

BAR SPACER FOR CONCRETE CONSTRUCTION.

Application filed February 24, 1922. Serial No. 538,879.

T 0 aZZ whom it may concern:

Be it known that I, JOHN F. HAVEMEYER, a citizen of the United States,and a resident of Ardsley-on-Hudson, county of Westchester, State of NewYork, have invented an Improvement in Bar Spacers for ConcreteConstruction, of which the following is a specification.

The present invention relates to concrete construction and has referencemore particularly to bar spacers of the type used for holding in desiredspaced relation the several turns of helical coils usually employed inconcrete columns to prevent lateral rupture.

The invention has for an object to pro vide an improved device of thistype and more particularly one which can be cheaply manufactured andassembled either in'the factory or in the field.

Spacers of the type described, as commonly manufactured, have aweb whichin use lies in a plane substantially radial to the helical coil, and itis provided with notches out deeply into the side thereof to receive thesuccessive turns of the coil. These notches are commonly madesubstantially deeper than the diameter of the bars received therein, andmeans is provided for closing the outer portion of the slot after theinsertion of the bar. The strength of spacers of this type both intension and in compression is obviously that of the smallest sectionwhich is'that adjacent the coil-receiving notch, and therefore isrelatively limited as compared with the weight of the bar on account ofthe deep slots.

The present invention afiords an improved means for securing the bars orcoils to the spacer whereby relatively deep notches in the edge of thespacer web are unnecessary, and therefore the invention makes possiblethe use of spacers of lighter weight requiring less material.

The nature and objects of the invention will be better understood from adescription of a particular embodiment thereof, reference being had tothe accompanying drawings, in which Figure 1 is a view in elevation of ahelical coil assembled with two bar spacers embodying the principle ofthe invention;

Figure 2 is a similar view of the same but showlng the parts in foldedrelation for storage, handling or shipping;

Figures 3 and 4 are detail views in elevation and perspective showingthe manner of securing a bar in position against the bar spacer by meansof a specially designed securing clip constructed in accordance with theinvention;

Figure 5 is a perspective view of the clip.

In the structure shown in the drawings. for the purpose of illustratingthe invention, bar spacers 5 engage opposite sides of a helical coil 6to hold the successive turns thereof in suitable spaced relation.

The spacers may conveniently be formed of angle iron as shown, one web 7of which lies in aplane radial to the coil and the turns of the coil areheld in place primarily by retaining clips 10, which encircle the barsor turns of the coil and suitably engage the spacer. Preferably notchesare formed in the engaged edge of the web 7 of sufficient depth morecertainly to prevent lateral slipping of the bars along the spacer. Itshould be noted that the notches, which may be of any shape desired, thearcuate shape shown being merely illustrative, need not be of anyparticular size or shape to hold a bar of given size against slipping.Accordingly, one standard form of spacer may be used with rods or wireof many commercial sizes. The clips are of a form to facilitate rapidassembly. The arrangement illustrated brings the rods or wire out beyond the spacer and close to the surface of the concrete for the reasonthat only the thickness of the clips projects beyond the rods, thespacers being almost entirely with in the coil and therefore relativelyfar from the surface of the concrete.

One form of clip is shown in Figure 5. It is formed of wire bent toprovide a U- shaped portion, to encircle the element to be retained, andend portions bent into a plane substantially at a right angle, orpreferably somewhat less than a right angle, to the body of the clip forconvenient insertion laterally through. suitable holes 12 in the radialweb 7. One or both of the end portions are so arranged that when finallypositioned in the holes 12 in the radial web the clip will be heldagainst accidental displacement. As shown, both end portions of the clipare arranged to be bent against the web and parallel to the body of theclip when inserted so that they will bear against the web in a manner toprevent displacement of the clip or turning of the spacer, The spacertherefore, it in the form of a flat bar, is positioned to presentmaximum rigidity. v I

The clips may, if desired, be inserted in the spacer, some from one sideand some from the other, thus more reliably preventing accidentalturning of the spacer, but ordinarily that is not necessary. If desired,the, clips may be made somewhat loose to facilitate folding of thehelical coils. The holes 12 are shown as rather large to facilitaterapid insertion of the clips and the arrangement is such that bifurcatedtools may be employed to bend both ends of the clips at the time ofinsertion.

Various possible embodiments may he madeof the invention and variouschanges in the embodiment described may be made, all within the scope ofthe subjoine'd claims I claim as my invention: i

1'. In a bar spacer for use in concrete construction, the combinationwith a b'a1 supporting member having a web and a series of relativelyshallow, spaced bar-engaging notches in a free edge-of said web, saidnotches being of less depth than the diameter of the bar. to be receivedtherein, of wire clips secured in the web adjacent the notches andextending" outwardly beyond the edge of the web to encircle the bars.

2. In a bar spacer for use in'concrete construction, the combinationwith a bark supporting member having a web and aseries of relativelyshallow, spaced bar-en gaging notches in a free edge of said web, saidnotches. being of less depth than the diameter of the bar to be receivedtherein, and clip-receiving holes adjacent said notches on either sidethereof, of U-shaped wire clips, each having end portionsbent into aplane at right angles to the body of the clip, adapted to be insertedinsaid .i notches on either side thereof, of Usha-ped holes and adapted-to provide retaining means to holdthe clip in applied position.

4. 4 r .s eeerri ecraus in Concrete construction, the combination with abar supporting member"having a web and a series of relatively shallow,spaced bar-engaging notches in a free edge of said web, said notchesbeing of less depth than the diameter of the bar to be receivedthereclip-receiving holes adjacent said wire clips each havingbendableend portions lying in a plane substantially at 'r'i'ght anglesto the plane of the body or the clip adapted to inserted in saidsl'oits,the free ends of the clips being arranged to be beiit into lockingposition to hold the clips in place. t I

4- In a bar spacer for use in concrete construction, the combinationwith a barsupporting member having a web and ries of relativelyshallow',spaced etigaging notches in a free edge of said febf sa'i'd notchesbeing of less depth 'th'ttiithe diameter of the bar to be receivedtherein, of u sha'ped wire clips each its end portion bent a right angleto the body of the clip, one 'eiid f provide retaining meats, s asms tomaintain the clip in p'ositidn on are web W I 5'. a bar spaeer for useis centres edastruction comprising'ja bar-supporting ber resentin awebarranged to lie in a plane at right angles to the bars supported by'it provided with pairs of spaced holes and clips adapted to;eficirclespaced bars and be secured in said holes tof 'seicure the barsagainst the edge of said web; A

In testimony whereof, thriv arr-easy name to this specification this21st day of February, 1922'.

JOHN F.

